diff --git a/charts/maddy/templates/config.yaml b/charts/maddy/templates/config.yaml
index 9c14421..166adc3 100644
--- a/charts/maddy/templates/config.yaml
+++ b/charts/maddy/templates/config.yaml
@@ -5,39 +5,10 @@
   namespace: {{ .Release.Namespace }}
 data:
   maddy.conf: |
-    # ----
-    ## Maddy Mail Server - default configuration file (2021-03-07)
-    # Suitable for small-scale deployments. Uses its own format for local users DB,
-    # should be managed via maddyctl utility.
-    #
-    # See tutorials at https://maddy.email for guidance on typical
-    # configuration changes.
-    #
-    # See manual pages (also available at https://maddy.email) for reference
-    # documentation.
-
-    # ----------------------------------------------------------------------------
-    # Base variables
-
     $(hostname) = mail.{{ .Values.ingress.public.domain }}
     $(primary_domain) = {{ .Values.ingress.public.domain }}
     $(local_domains) = $(primary_domain)
-    
-    tls file /etc/maddy/certs/tls.crt /etc/maddy/certs/tls.key
-    
-    # ----------------------------------------------------------------------------
-    # Local storage & authentication
-    
-    # pass_table provides local hashed passwords storage for authentication of
-    # users. It can be configured to use any "table" module, in default
-    # configuration a table in SQLite DB is used.
-    # Table can be replaced to use e.g. a file for passwords. Or pass_table module
-    # can be replaced altogether to use some external source of credentials (e.g.
-    # PAM, /etc/shadow file).
-    #
-    # If table module supports it (sql_table does) - credentials can be managed
-    # using 'maddyctl creds' command.
-    
+
     auth.pass_table local_authdb {
         table sql_table {
             driver sqlite3
@@ -45,59 +16,45 @@
             table_name passwords
         }
     }
-    
-    # imapsql module stores all indexes and metadata necessary for IMAP using a
-    # relational database. It is used by IMAP endpoint for mailbox access and
-    # also by SMTP & Submission endpoints for delivery of local messages.
-    #
-    # IMAP accounts, mailboxes and all message metadata can be inspected using
-    # imap-* subcommands of maddyctl utility.
-    
+
     storage.imapsql local_mailboxes {
         driver sqlite3
         dsn imapsql.db
     }
-    
-    # ----------------------------------------------------------------------------
-    # SMTP endpoints + message routing
-    
+
     hostname $(hostname)
-    
+
     msgpipeline local_routing {
-        # Insert handling for special-purpose local domains here.
-        # e.g.
-        # destination lists.example.org {
-        #     deliver_to lmtp tcp://127.0.0.1:8024
-        # }
-    
         destination postmaster $(local_domains) {
             modify {
                 replace_rcpt regexp "(.+)\+(.+)@(.+)" "$1@$3"
                 replace_rcpt file /etc/maddy/aliases
             }
-    
+
             deliver_to &local_mailboxes
         }
-    
+
         default_destination {
             reject 550 5.1.1 "User doesn't exist"
         }
     }
-    
+
     smtp tcp://0.0.0.0:25 {
+        tls off
+
         limits {
             # Up to 20 msgs/sec across max. 10 SMTP connections.
             all rate 20 1s
             all concurrency 10
         }
-    
+
         dmarc yes
         check {
             require_mx_record
             dkim
             spf
         }
-    
+
         source $(local_domains) {
             reject 501 5.1.8 "Use Submission for outgoing SMTP"
         }
@@ -110,23 +67,25 @@
             }
         }
     }
-    
+
     submission tls://0.0.0.0:465 tcp://0.0.0.0:587 {
+        tls file /etc/maddy/certs-private/tls.crt /etc/maddy/certs-private/tls.key
+
         limits {
             # Up to 50 msgs/sec across any amount of SMTP connections.
             all rate 50 1s
         }
-    
+
         auth &local_authdb
-    
+
         source $(local_domains) {
             destination postmaster $(local_domains) {
                 deliver_to &local_routing
             }
             default_destination {
-                modify {
-                    dkim $(primary_domain) $(local_domains) default
-                }
+                # modify {
+                #     dkim $(primary_domain) $(local_domains) default
+                # }
                 deliver_to &remote_queue
             }
         }
@@ -135,29 +94,16 @@
         }
     }
 
-    target.remote outbound_delivery {
-        limits {
-            # Up to 20 msgs/sec across max. 10 SMTP connections
-            # for each recipient domain.
-            destination rate 20 1s
-            destination concurrency 10
-        }
-        mx_auth {
-            dane
-            mtasts {
-                cache fs
-                fs_dir mtasts_cache/
-            }
-            local_policy {
-                min_tls_level encrypted
-                min_mx_level none
-            }
-        }
+    target.smtp outbound_gateway {
+      hostname {{ .Values.mailGateway.mxHostname }}
+      attempt_starttls false
+      require_tls no
+      auth forward
+      targets {{ .Values.mailGateway.address}}
     }
-    
+
     target.queue remote_queue {
-        target &outbound_delivery
-    
+        target &outbound_gateway
         autogenerated_msg_domain $(primary_domain)
         bounce {
             destination postmaster $(local_domains) {
@@ -168,11 +114,9 @@
             }
         }
     }
-    
-    # ----------------------------------------------------------------------------
-    # IMAP endpoints
-    
+
     imap tls://0.0.0.0:993 tcp://0.0.0.0:143 {
+        tls file /etc/maddy/certs-private/tls.crt /etc/maddy/certs-private/tls.key
         auth &local_authdb
         storage &local_mailboxes
     }
diff --git a/charts/maddy/templates/install.yaml b/charts/maddy/templates/install.yaml
index 1ecc7a9..dad1fa7 100644
--- a/charts/maddy/templates/install.yaml
+++ b/charts/maddy/templates/install.yaml
@@ -103,6 +103,8 @@
     metadata:
       labels:
         app: maddy
+      annotations:
+        checksum/config: {{ include (print $.Template.BasePath "/config.yaml") . | sha256sum }}
     spec:
       volumes:
       - name: config
@@ -111,6 +113,9 @@
       - name: certs
         secret:
           secretName: cert-mail.{{ .Values.ingress.public.domain}}
+      - name: certs-private
+        secret:
+          secretName: cert-wildcard.{{ .Values.ingress.private.domain}}
       - name: data
         persistentVolumeClaim:
           claimName: data
@@ -141,10 +146,13 @@
         volumeMounts:
         - name: config
           mountPath: /etc/maddy/config
-        - name: certs
-          mountPath: /etc/maddy/certs
+          readOnly: true
+        - name: certs-private
+          mountPath: /etc/maddy/certs-private
+          readOnly: true
         - name: data
           mountPath: /var/lib/maddy
+          readOnly: false
       - name: web
         image: giolekva/maddy-web:latest
         imagePullPolicy: Always
@@ -160,10 +168,13 @@
         volumeMounts:
         - name: config
           mountPath: /etc/maddy/config
+          readOnly: true
         - name: certs
           mountPath: /etc/maddy/certs
+          readOnly: true
         - name: data
           mountPath: /var/lib/maddy
+          readOnly: false
 ---
 apiVersion: v1
 kind: ConfigMap
@@ -175,7 +186,7 @@
     version: STSv1
     mode: enforce
     max_age: 604800
-    mx: mail.{{ .Values.ingress.public.domain }}
+    mx: {{ .Values.mailGateway.mxHostname }}
 ---
 apiVersion: apps/v1
 kind: Deployment
diff --git a/charts/maddy/templates/mta-sts.yaml b/charts/maddy/templates/mta-sts.yaml
new file mode 100644
index 0000000..bad3794
--- /dev/null
+++ b/charts/maddy/templates/mta-sts.yaml
@@ -0,0 +1,101 @@
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: mta-sts
+  namespace: {{ .Release.Namespace }}
+data:
+  mta-sts.txt: |
+    version: STSv1
+    mode: enforce
+    max_age: 604800
+    mx: {{ .Values.mailGateway.mxHostname}}
+---
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: mta-sts.{{ .Values.ingress.public.domain }}
+  namespace: {{ .Release.Namespace }}
+  annotations:
+    "helm.sh/resource-policy": keep
+spec:
+  dnsNames:
+  - 'mta-sts.{{ .Values.ingress.public.domain }}'
+  issuerRef:
+    name: {{ .Values.ingress.public.certificateIssuer }}
+    kind: ClusterIssuer
+  secretName: cert-mta-sts.{{ .Values.ingress.public.domain }}
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: mta-sts
+  namespace: {{ .Release.Namespace }}
+spec:
+  ingressClassName: {{ .Values.ingress.public.className }}
+  tls:
+  - hosts:
+    - mta-sts.{{ .Values.ingress.public.domain }}
+    secretName: cert-mta-sts.{{ .Values.ingress.public.domain }}
+  rules:
+  - host: mta-sts.{{ .Values.ingress.public.domain }}
+    http:
+      paths:
+      - pathType: Prefix
+        path: "/"
+        backend:
+          service:
+            name: mta-sts
+            port:
+              name: http
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: mta-sts
+  namespace: {{ .Release.Namespace }}
+spec:
+  type: ClusterIP
+  selector:
+    app: mta-sts
+  ports:
+    - name: http
+      port: 80
+      targetPort: http
+      protocol: TCP
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: mta-sts
+  namespace: {{ .Release.Namespace }}
+spec:
+  selector:
+    matchLabels:
+      app: mta-sts
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: mta-sts
+    spec:
+      volumes:
+      - name: mta-sts
+        configMap:
+          name: mta-sts
+      containers:
+      - name: maddy
+        image: giolekva/static-file-server:latest
+        imagePullPolicy: Always
+        ports:
+        - name: http
+          containerPort: 80
+          protocol: TCP
+        command:
+        - static-file-server
+        - --port=80
+        - --dir=/etc/static-file-server/data
+        volumeMounts:
+        - name: mta-sts
+          mountPath: /etc/static-file-server/data/.well-known
+          readOnly: true
diff --git a/charts/maddy/values.yaml b/charts/maddy/values.yaml
index 815ca99..984109e 100644
--- a/charts/maddy/values.yaml
+++ b/charts/maddy/values.yaml
@@ -1,3 +1,6 @@
+mailGateway:
+  mxHostname: mail.example.com
+  address: tcp://maddy.pcloud-mail-gateway.svc.cluster.local:587
 ingress:
   private:
     className: ingress-private